diff --git a/src/pendulum/tz/timezone.py b/src/pendulum/tz/timezone.py
index e46e13df1..ffc3c1304 100644
--- a/src/pendulum/tz/timezone.py
+++ b/src/pendulum/tz/timezone.py
@@ -69,6 +69,9 @@ def __new__(cls, key: str) -> Self:
     def __eq__(self, other: object) -> bool:
         return isinstance(other, Timezone) and self.key == other.key
 
+    def __hash__(self) -> int:
+        return hash(self.key)
+
     @property
     def name(self) -> str:
         return self.key
@@ -178,6 +181,9 @@ def __init__(self, offset: int, name: str | None = None) -> None:
     def __eq__(self, other: object) -> bool:
         return isinstance(other, FixedTimezone) and self._offset == other._offset
 
+    def __hash__(self) -> int:
+        return hash(self._offset)
+
     @property
     def name(self) -> str:
         return self._name
diff --git a/tests/tz/test_timezone.py b/tests/tz/test_timezone.py
index 3f0901681..cef378419 100644
--- a/tests/tz/test_timezone.py
+++ b/tests/tz/test_timezone.py
@@ -47,6 +47,18 @@ def test_equality():
     assert timezone("Europe/Paris") != timezone("Europe/Berlin")
 
 
+def test_hashable():
+    # Timezones are hashable and can be used as dict keys / set members.
+    # __eq__ and __hash__ must stay consistent: equal timezones hash equally.
+    assert hash(timezone("Europe/Paris")) == hash(timezone("Europe/Paris"))
+    assert timezone("Europe/Paris") in {timezone("Europe/Paris")}
+    assert len({timezone("Europe/Paris"), timezone("Europe/Berlin")}) == 2
+
+    assert hash(fixed_timezone(3600)) == hash(fixed_timezone(3600))
+    assert fixed_timezone(3600) in {fixed_timezone(3600)}
+    assert len({fixed_timezone(3600), fixed_timezone(7200)}) == 2
+
+
 def test_skipped_time_with_pre_rule():
     dt = datetime(2013, 3, 31, 2, 30, 45, 123456, fold=0)
     tz = timezone("Europe/Paris")